I've been invited to a sprinkle. The mom-to-be made it clear that presents were not expected, but she got some anyway (starting out family, so we knew there were things they needed to make their lives easier). It was more along the lines of a 'Welcome Baby' party - there were games, food, and a general party atmosphere. The term may be cutesy, but it was a nice time to give some attention to Second Baby and the mom.